package com.zzyl.service.impl;

import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.zzyl.exception.BaseException;
import com.zzyl.service.WeChatService;
import com.zzyl.utils.ObjectUtil;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class WeChatServiceImpl implements WeChatService {


    // 登录
    private static final String REQUEST_URL = "https://api.weixin.qq.com/sns/jscode2session?grant_type=authorization_code";

    // 获取token
    private static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";

    // 获取手机号
    private static final String PHONE_REQUEST_URL = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=";

    @Value("${zzyl.wechat.appId}")
    private String appId;

    @Value("${zzyl.wechat.appSecret}")
    private String appSecret;

    /**
     * 获取openId
     *
     * @param code 登录凭证
     * @return
     */
    @Override
    public String getOpenId(String code) {

        Map<String, Object> map = getAppConfig();

        map.put("js_code", code);

        String resultStr = HttpUtil.get(REQUEST_URL, map);

        JSONObject jsonObject = JSONUtil.parseObj(resultStr);

        if (ObjectUtil.isNotEmpty(jsonObject.getInt("errcode"))) {
            throw new BaseException(jsonObject.getStr("errmsg"));
        }

        return jsonObject.getStr("openid");
    }

    private Map<String, Object> getAppConfig() {
        Map<String, Object> map = new HashMap<>();

        map.put("appid", appId);
        map.put("secret", appSecret);
        return map;
    }

    /**
     * @param code
     * @return
     */
    @Override
    public String getPhone(String code) {

        String token = getToken();

        String url = PHONE_REQUEST_URL + token;

        Map<String, Object> map = new HashMap<>();

        map.put("code", code);

        String resultStr = HttpUtil.post(url, JSONUtil.toJsonStr(map));

        JSONObject jsonObject = JSONUtil.parseObj(resultStr);

        if (jsonObject.getInt("errcode") != 0) {
            throw new BaseException(jsonObject.getStr("errmsg"));
        }

        return jsonObject.getJSONObject("phone_info").getStr("phoneNumber");
    }


    public String getToken() {
        Map<String, Object> map = getAppConfig();

        String resultStr = HttpUtil.get(TOKEN_URL, map);

        JSONObject jsonObject = JSONUtil.parseObj(resultStr);

        if (ObjectUtil.isNotEmpty(jsonObject.getInt("errcode"))) {
            throw new BaseException(jsonObject.getStr("errmsg"));
        }

        return jsonObject.getStr("access_token");
    }
}
